Hayato's Realtek WiFi/BT module has it's Bluetooth function wired to
UART1.

Add and enable the relevant device nodes for it.
Signed-off-by: Chen-Yu Tsai <wenst@chromium.org>
Reviewed-by: Nícolas F. R. A. Prado <nfraprado@collabora.com>
Link: https://lore.kernel.org/r/20230424100409.2992418-1-wenst@chromium.orgSigned-off-by: Matthias Brugger <matthias.bgg@gmail.com>